13 Fragen / Questions

[lukas]

Can one say, that in case, when one has for square three rubies and one non-ruby, then non-ruby is considered to be not connected (or, formulated another way, there should be either no non-rubies, or two, or four non-rubies for the square), in order for it to be considered a valid square?

Yes, a single non-ruby is considered as connected.